/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2005 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Application
    elasticNonLinULSolidFoam

Description
    Finite volume structural solver employing a incremental strain updated
    Lagrangian approach.
    
    Valid for small strains, finite displacements and finite rotations.
    
Author
    Philip Cardiff


\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "rheologyModel.H"
//#include "solidInterface.H"
#include "volPointInterpolation.H"
//#include "pointPatchInterpolation.H"
#include "primitivePatchInterpolation.H"
#include "pointFields.H"
#include "plane.H"
#include "meshSearch.H"
#include "twoDPointCorrector.H"
#include "leastSquaresVolPointInterpolation.H"
#include "processorFvPatchFields.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
# include "setRootCase.H"

# include "createTime.H"

# include "createMesh.H"

# include "createFields.H"

# include "readDivDSigmaExpMethod.H"

# include "readDivDSigmaLargeStrainExpMethod.H"

# include "readMoveMeshMethod.H"

  //# include "createSolidInterface.H"

//* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

  Info << "\nStarting time loop\n" << endl;
  
  for (runTime++; !runTime.end(); runTime++)
    {
      Info<< "Time = " << runTime.timeName() << nl << endl;
      	  
#     include "readStressedFoamControls.H"

      int iCorr = 0;
      lduMatrix::solverPerformance solverPerf;
      scalar initialResidual = 0;
      scalar relativeResidual = GREAT;
      lduMatrix::debug = 0;
      
      do
	{ 
	  DU.storePrevIter();

	  divDSigmaLargeStrainExp.storePrevIter();

#         include "calculateDivDSigmaExp.H"
	  
#         include "calculateDivDSigmaLargeStrainExp.H"

	  //----------------------------------------------------//
	  //- updated lagrangian large strain momentum equation
	  //----------------------------------------------------//
	  fvVectorMatrix DUEqn
	    (
	     fvm::d2dt2(rho,DU)
	     ==
	     fvm::laplacian(2*muf + lambdaf, DU, "laplacian(DDU,DU)")
	     + divDSigmaExp
	     + divDSigmaLargeStrainExp
	     );
	  
// 	  if(solidInterfaceCorr)
// 	    {
// 	      solidInterfacePtr->correct(DUEqn);
// 	    }

	  solverPerf = DUEqn.solve();

	  if(iCorr == 0)
            {
	      initialResidual = solverPerf.initialResidual();
            }
	 
	  DU.relax();
	  
// 	  if(solidInterfaceCorr)
// 	    {
// 	      gradDU = solidInterfacePtr->grad(DU);
// 	    }
// 	  else
// 	    {
	      gradDU = fvc::grad(DU);
// 	    }
	  
#         include "calculateDEpsilonDSigma.H"

#         include "calculateRelativeResidual.H"
	  	  
	  Info << "\tTime " << runTime.value()
	       << ", Corrector " << iCorr
	       << ", Solving for " << DU.name()
	       << " using " << solverPerf.solverName()
	       << ", residual = " << solverPerf.initialResidual()
	       << ", residualDU = " << relativeResidual
	       << ", inner iterations " << solverPerf.nIterations() << endl;
        }
      while
        (
	 //solverPerf.initialResidual() > convergenceTolerance 
	 relativeResidual > convergenceTolerance
         && ++iCorr < nCorr
	 );

      lduMatrix::debug = 1;
            
      Info << nl << "Time " << runTime.value() << ", Solving for " << DU.name() 
	   << ", Initial residual = " << initialResidual 
	   << ", Final residual = " << solverPerf.initialResidual()
	   << ", No outer iterations " << iCorr << endl;
            
#     include "rotateFields.H"

#     include "moveMesh.H"

#     include "writeFields.H"

      //- total force
      forAll(mesh.boundary(), patchi)
        {
          vector force = sum(mesh.Sf().boundaryField()[patchi] & sigma.boundaryField()[patchi]);
          Info << "force on " << mesh.boundary()[patchi].name()
               << " is " << force << endl;
        }

      Info << nl << "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
	   << "  ClockTime = " << runTime.elapsedClockTime() << " s" 
	   << endl;
    }
  
  Info<< "End\n" << endl;
  
  return(0);
}

// ************************************************************************* //
